An acidic solution of dichromate is electrolyzed for 8 minutes using 2 A current. As per the following equation:

The amount of obtained was 0.104 g. The efficiency of the process (in %) is .

(Take

Question

An acidic solution of dichromate is electrolyzed for 8 minutes using 2 A current. As per the following equation:

The amount of  obtained was 0.104 g. The efficiency of the process (in %) is .

(Take: , At. mass of chromium = 52)

Canvas Classes · Accepted Answer

Strategy:
 Calculate the theoretical mass of Chromium produced using Faraday's Law and compare it with the actual mass obtained to find the percentage efficiency.

Step 1: Calculate total charge passed ()

Step 2: Find theoretical yield
Reduction: 
6 moles of  () produce 2 moles of .
Therefore,  produces:

Step 3: Calculate Efficiency

More questions from Electrochemistry